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Key
disk
A diskette containing a copy-protected program that must
remain in the diskette drive while you are using the program.
Kilobyte (KB)
A unit used to measure storage space in a computer’s memory or
on a disk. One kilobyte equals 1024 bytes.
LIM 4.0 EMS
Version 4.0 of the Lotus/Intel/Microsoft Expanded Memory
Specification-a protocol that allows certain application
programs to use memory that MS-DOS cannot use.
Main system board
The board built into your computer containing the circuitry the
computer requires to operate.
Math coprocessor
An optional device that enables the computer to process certain
mathematical calculations faster.
MCGA
Monochrome/Color Graphics Adapter. A type of display adapter
that runs either a monochrome or color graphics monitor.
MDA
Monochrome Display Adapter. A type of display adapter that
displays text in only one color, such as green or amber.
Megabyte (MB)
A unit used to measure storage space in a computer’s memory or
on a disk. One megabyte equals 1024KB.
10 Glossary